i2c: core: disable runtime PM on adapter registration failure

i2c: core: disable runtime PM on adapter registration failure

Runtime PM is disabled by driver core when deregistering a device (and
on registration failure) but add an explicit disable to balance the
enable call when adapter registration fails for symmetry.

Fixes: 23a698fe65ec ("i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs")
Cc: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>